Each of the following small molecules easily diffuses through the cell membrane EXCEPT ____
a. steroid hormones
b. O2
c. H2O
d. glucose
e. CO2
D
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A vaccine for the common cold is not feasible because
A. the surface antigens of rhinovirus mutate frequently. B. the cause is unknown. C. the rhinovirus cannot be grown in sufficient quantities. D. there are more than 100 types of rhinovirus.
Which sequence of events is most CORRECT for the initiation and elongation steps of translation?
(1) initiator tRNA binds start codon on mRNA (2) small ribosomal subunit binds to mRNA (3) large ribosomal subunit binds (4) tRNA entry and peptidyl transfer reaction (5) translocation of ribosome and release of tRNA A. 1, 2, 3, 4, 5 B. 1, 2, 3, 5, 4 C. 1, 3, 2, 4, 5 D. 2, 3, 1, 5, 4 E. 2, 1, 3, 4, 5
Identify human genetic defects or diseases that are inherited as:
A. an autosomal recessive. B. an autosomal dominant. C. an X-linked recessive. What will be an ideal response?
The cross AaBb × AaBb is an example of a _______ cross and the results of such crosses led Mendel to propose what we now call the law of _______.
A: test; segregation of genes B: test; independent assortment C: dhybrid; independent assortment D: self; segregation of genes E: dihybrid; segregation of genes